. Which functions have the same axis of symmetry?
A f(x) = 2x² +1 and f(x) = -4x?
B f(x)= 3x² + 4x and f(x) = 3x?
C f(x) = (x + 1)2 and f(x)=(x-3)?

What is the value of x when x + 7 = 21?

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

The legs of a right triangle measure 6 meters and 8 meters. what is the length of the hypotonuse.